如何使用go和mongodb在heroku上部署应用程序而不会出现错误？

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无法部署。出现错误：

cannot load go.mongodb.org/mongo-driver/mongo: open /tmp/build_aa982e7b99ad67f15e2c45be4077d6e9/vendor/go.mongodb.org/mongo-driver/mongo: no such file or directory

我尝试过导入方式：

1）“go.mongodb.org/mongo-driver/mongo”

在本地工作正常，但在部署过程中崩溃

2）“github.com/mongodb/mongo-go-driver/mongo”

不起作用

main.go：

package main

import (
    "fmt"
    "log"
    "net/http"
    "os"
    "context"

    "github.com/gin-gonic/gin"
    _ "github.com/heroku/x/hmetrics/onload"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

const (
    usernamekey = "xxx"
    passwordkey = "xxx"
    hostkey     = "ds131905.mlab.com:31905"
    databasekey = "heroku_zj4jbgpn"
)

func main() {
    port := os.getenv("port")

    if port == "" {
        log.fatal("$port must be set")
    }

    router := gin.new()
    router.use(gin.logger())
    router.loadhtmlglob("templates/*.tmpl.html")
    router.static("/static", "static")

    router.get("/", func(c *gin.context) {
        c.html(http.statusok, "index.tmpl.html", nil)
    })

    connecttomongodb()

    router.run(":" + port)
}


func connecttomongodb() {
    ctx := context.todo()

    db, err := configdb(ctx)
    if err != nil {
        log.fatalf("database configuration failed: %v", err)
    }

    fmt.printf("found a single document: %+v\n", db)

}

func configdb(ctx context.context) (*mongo.database, error) {
    uri := fmt.sprintf(`mongodb://%s:%s@%s/%s`,
        usernamekey,
        passwordkey,
        hostkey,
        databasekey,
    )
    client, err := mongo.newclient(options.client().applyuri(uri))
    if err != nil {
        return nil, fmt.errorf("couldn't connect to mongo: %v", err)
    }

    err = client.connect(ctx)
    if err != nil {
        return nil, fmt.errorf("todo: mongo client couldn't connect with background context: %v", err)
    }
    fmt.println("----->>>>> mongo client connected!!!")
    tododb := client.database(databasekey)
    return tododb, nil
}

部署日志：

-----> go app detected
-----> fetching stdlib.sh.v8... done
-----> 
       detected go modules via go.mod
-----> 
       detected module name: github.com/heroku/go-getting-started
-----> 
 !!    the go.mod file for this project does not specify a go version
 !!    
 !!    defaulting to go1.12.5
 !!    
 !!    for more details see: https://devcenter.heroku.com/articles/go-apps-with-modules#build-configuration
 !!    
-----> using go1.12.5
-----> determining packages to install

       detected the following main packages to install:
            github.com/heroku/go-getting-started

-----> running: go install -v -tags heroku -mod=vendor github.com/heroku/go-getting-started 
build github.com/heroku/go-getting-started: cannot load go.mongodb.org/mongo-driver/mongo: open /tmp/build_aa982e7b99ad67f15e2c45be4077d6e9/vendor/go.mongodb.org/mongo-driver/mongo: no such file or directory
 !     push rejected, failed to compile go app.
 !     push failed

.bash_progile

export gopath=$home/go
export path=$path:$gopath/bin

项目地点：

/users/denis/go/src/github.com/heroku/aqueous-ridge-14148/

mongo 驱动程序位置：

/Users/denis/go/src/go.mongodb.org/mongo-driver/

解决方案

我需要将我的应用程序从 $GOPATH/src 目录移动，并使用 go get go.mongodb.org/mongo-driver 安装 mongodb 驱动程序，如 this 教程中所示。

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